Injection mold for automobile bumper production

Abstract

The invention discloses an injection mold for automobile bumper production, and belongs to the technical field of automobile bumper injection molds. A mold for automobile bumper production injection molding comprises a mold containing base, a lower mold assembly is arranged at the top of the mold containing base, an upper mold assembly is further arranged on the outer wall of the mold containing base, a cleaning assembly is arranged on the outer wall of the rear portion of a movable plate, and a cooling treatment assembly is arranged at the bottom of a supporting table. The overall cooling effect of the automobile bumper is effectively improved, cooling gas is fully utilized, the function of the mold in the product machining process can be expanded, the mold is not limited to the pure forming function any more, the functions of assisting product surface treatment and cooling optimization are further achieved, and the product machining efficiency is improved. And secondly, in the material taking process, the effect of cleaning the forming lower die can be achieved, the time consumed by shutdown for cleaning operation can be greatly shortened, and the continuity and high efficiency of the whole production process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile bumper injection molds, in particular to an injection mold used for automobile bumper production. Background Art

[0002] The car bumper is an important component installed at the front and rear of the car to absorb and mitigate external impact, protect the car body and occupants, and is generally made of plastic. The injection mold for car bumper production is a special mold designed specifically for the manufacture of car bumpers. It has a cavity and cooling system that matches the shape and structure of the bumper. By injecting molten plastic into the mold cavity and cooling and shaping it, a car bumper product with a specific shape and dimensional accuracy can be obtained. The mold plays an extremely critical role in the quality, production efficiency and cost control of the bumper.

[0004] The existing injection molds for automobile bumper production have many significant drawbacks in actual use:

[0005] First, in terms of mold structure and injection molding cooling, common automobile bumper production injection molding molds are usually composed of an upper mold and a lower mold. When performing automobile bumper injection molding, the upper and lower molds are first closed to form a cavity, and then molten plastic is injected into the interior. The shape of the mold is used to shape the contour of the bumper to achieve injection molding, and then water cooling or air cooling is used for cooling. However, the water cooling or air cooling method used has obvious defects. Due to the limitations of its cooling design, it can often only focus on cooling one side of the bumper. For example, when cooling water flows through one side of the mold or the air cooling device only blows on one side of the mold, the bumper The other side of the bumper is difficult to directly contact with the cold source, and the heat cannot be dissipated quickly and evenly. This unbalanced cooling condition causes the entire cooling process to take a long time, greatly prolonging the production cycle of the product, bringing great obstacles to the company's large-scale production plan, and seriously affecting production efficiency. Moreover, relying solely on water cooling or air cooling, the cooling rate is relatively slow, which is difficult to meet the strict requirements of modern high-speed production for rapid cooling and shaping. It is impossible to make the bumper reach the ideal molding state in a short time, which greatly reduces the cooling effect of the product, and may cause quality problems such as product deformation and uneven internal stress, reducing the product's qualification rate and stability.

[0006] Second, the existing cooling methods are too simplistic. In the complex and demanding process system of automobile bumper injection molding, cooling is not only a process of lowering the temperature, but should also be coordinated with the entire production process to play a multi-faceted role. However, the existing cooling methods are limited to the basic function of temperature control and fail to combine with key requirements of other production links such as improving product surface quality. The cooling methods cannot provide such flexible and targeted cooling strategies, and cannot give products additional performance advantages during the injection molding process, which is not conducive to the products standing out in the market competition and limits the room for improving product added value.

[0007] Third, there are serious deficiencies in mold cleaning and maintenance. In the actual production process, the injection mold needs to be cleaned regularly to ensure the cleanliness of the mold cavity and the molding accuracy. However, the existing injection mold cleaning methods mostly rely on manual cleaning, which is extremely cumbersome and consumes manpower and material resources, especially the molding groove of the lower mold. Due to the long-term continuous injection molding process, factors such as impurities, additive residues and release agent accumulation in the plastic raw materials will gradually accumulate a large amount of impurities and dirt in the molding groove. In order to ensure the quality of the product produced by the next injection molding, the staff have to frequently clean the molding groove. This high-intensity manual cleaning work not only requires the staff to have a high degree of patience and carefulness, but also long-term repetitive labor can easily cause fatigue to the staff, greatly increasing the labor intensity and work pressure of the staff. At the same time, manual cleaning is inefficient, and each cleaning process takes a lot of time, which prolongs the downtime of the mold, directly leading to a decrease in the overall utilization rate of the production equipment, thereby affecting the production capacity and economic benefits of the enterprise. In addition, the existing injection mold faces many inconveniences when removing the car bumper after injection molding. Normally, personnel are often required to manually take the car bumper out of the molding groove of the mold. Although some molds are equipped with stripping devices, these stripping devices have limited functions and their degree of automation is seriously insufficient. They can often only complete the initial demolding action. Subsequently, personnel still need to perform a lot of auxiliary operations to completely remove the bumper from the mold. Summary of the invention

[0008] The object of the present invention is to provide an injection mold for producing automobile bumpers, comprising a mold placement seat, a lower mold assembly is arranged on the top of the mold placement seat, an upper mold assembly is also arranged on the outer wall of the mold placement seat, an ultrasonic generator is arranged on the front outer wall of the mold placement seat, a through opening is opened on the outer wall of the mold placement seat, a support column is arranged on the bottom of the mold placement seat, the lower mold assembly comprises a support platform, the inner wall of the support platform is rotatably connected with a molding lower mold, a vibration motor is arranged at the bottom of the molding lower mold, an exhaust port is opened on the inner wall of the support platform, a connecting shell one is arranged on the outer wall of one side of the support platform, and the connecting shell one is connected to the Corresponding to the exhaust port, the outer wall on the other side of the support platform is provided with a connecting shell 2 and an air intake valve, the front outer wall of the support platform is provided with a screw motor, the output end of the screw motor is connected to a screw, and the circumferential outer wall of the screw is sleeved with a material picking assembly, the material picking assembly includes a moving plate, and a cleaning assembly is provided on the outer wall behind the moving plate, the cleaning assembly includes a connecting plate, a cooling treatment assembly is provided at the bottom of the support platform, and the cooling treatment assembly includes a fixed shell, a hardener placement box is provided inside the fixed shell, a connecting seat is provided at the bottom of the inner cavity of the fixed shell, and an ultrasonic atomizer electrically connected to the ultrasonic generator is provided on the top of the connecting seat.

[0009] Preferably, the upper mold assembly includes a support frame, a hydraulic lift is arranged on the top of the support frame, the output end of the hydraulic lift is connected to the upper injection mold, a rotating motor is arranged on the outer wall of one side of the support frame, and the output end of the rotating motor is connected to the outer wall of one side of the lower molding mold.

[0010] Preferably, a filter plate is fixedly connected to an inner wall of the connecting shell, and a return pipe is also provided on an outer wall of the connecting shell. The return pipe is connected to an air outlet after extending to the inside of the hardener placement box.

[0011] Preferably, a through circular opening is provided on the outer wall of the movable plate, the through circular opening matches the air inlet valve, an air outlet is provided on the top of the movable plate, and a rubber pad is also provided on the top of the movable plate.

[0012] Preferably, a rotating roller is rotatably connected between the plurality of connecting plates, a dust suction port is provided on the circumferential outer wall of the rotating roller, a brush is also provided on the circumferential outer wall of the rotating roller, a gear is provided on the outer wall of one side of the rotating roller, a guide block is provided on the outer wall of the connecting plate on one side, and a rotating dust suction pipe is rotatably connected to the outer wall of the connecting plate on the other side, and the rotating dust suction pipe extends to the interior of the rotating roller.

[0013] Preferably, a support plate is provided on the front outer wall of the movable plate, and partition plates are also provided on the tops of the plurality of connecting plates.

[0014] Preferably, the bottom of the inner cavity of the second connecting shell is provided with tooth patterns matching the gear, and the top of the inner cavity of the second connecting shell is provided with a guide block matching the guide block.

[0015] Preferably, the outer walls on both sides of the fixed shell are further provided with a through groove 2 and a through circular groove, the outer walls on both sides of the hardener placement box are provided with a through groove 1 corresponding to the through groove 2, the inner wall of the hardener placement box is provided with a liquid level sensor, and the side wall of the hardener placement box is further provided with a delivery pump, the output end of the delivery pump is connected to a plurality of infusion tubes, and the ends of the plurality of infusion tubes are respectively connected to the water inlet ends of the plurality of ultrasonic atomizers.

[0016] Preferably, a plurality of cooling vortex tubes are fixedly sleeved on the inner walls of the through circular grooves, a mounting shell is connected between the cold air ends of the plurality of cooling vortex tubes, a plurality of ultrasonic atomizer output ends are arranged inside the mounting shell, a connecting pipe is arranged on the outer wall of the mounting shell, a plurality of connecting pipe ends are connected to the air inlet end of the fan, a gas supply pipe is connected to the output end of the fan, and a plurality of gas supply pipe ends are respectively connected to the inside of the air inlet valve.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: after the injection molding operation of the automobile bumper is completed, the rotating motor is first turned on. When the rotating motor is running, it can drive the lower molding mold to flip along a specific axis until one side of the automobile bumper is in a downward position. Then the delivery pump is started, and the delivery pump extracts the liquid hardener stored in the hardener placement box and delivers it to the ultrasonic atomizer. The multiple ultrasonic atomizers use the principle of high-frequency vibration to decompose the liquid hardener into tiny mist particles. At the same time, compressed gas is injected into multiple cooling vortex tubes. The cooling vortex tubes generate cold air with low-temperature characteristics based on the special internal structure and gas flow principle. Under the joint action of the airflow generated by the fan and the cold wind generated by the cooling vortex tube, the liquid hardener that has been converted into mist is pulled into the internal space of the moving plate. These mist hardeners move inside the moving plate and are finally discharged outward through multiple through-holes evenly distributed on the top of the moving plate. Under the continuous blowing of the cold wind, the mist hardener is evenly attached to the surface of the automobile bumper. When the hardener After the blowing process of the curing agent is completed, the operation of multiple ultrasonic atomizers is stopped, but the working state of cold air supply is maintained. During this period, the vibration motor starts to work, and the vibration wave generated by it is transmitted to the lower molding mold, so that the bumper is separated from the molding groove under the action of vibration and falls on the moving plate under the action of gravity. At this time, the other side of the bumper can be brought into contact with the cold source, thereby achieving a more comprehensive cooling treatment of the bumper. The excess discharged cooling gas is filtered through the filter plate, and the filtered cooling gas is reintroduced into the hardener placement box through the reflux pipe. Inside the hardener placement box, the cooling gas forms bubbles and rises. On the one hand, the liquid hardener is evenly mixed under the disturbance of the bubbles, and on the other hand, the remaining cold in the cooling gas is transferred to the liquid hardener to further reduce its temperature. In this way, when the liquid hardener is atomized again, its own low temperature state can further cool the bumper, effectively improving the overall cooling effect of the automobile bumper and achieving full utilization of the cooling gas.

[0018] In addition, the liquid hardener mist technology is used in the treatment of automobile bumpers. The liquid hardener can be more densely and evenly attached to the outer wall of the automobile bumper in the form of mist, and is dried under the action of continuous air cooling, thereby forming a protective layer with certain protective performance, effectively improving the product quality of automobile bumpers. Performance indicators such as surface hardness, wear resistance, and corrosion resistance are all improved. This method of combining bumper surface treatment with cooling process expands the function of molds in the product processing process. It is no longer limited to simple molding functions, but also has the function of assisting product surface treatment and cooling optimization.

[0019] When the bumper needs to be taken out after cooling is completed, multiple screw motors are started synchronously, and the screws of the screw motors are connected to the moving plate carrying the bumper. The operation of the multiple screw motors drives the screws to rotate, thereby pushing the moving plate to move outward. In the process of the moving plate moving outward, the gear fixed on the outer wall of one side of the rotating roller cooperates with the tooth pattern at the bottom of the inner cavity of the second connecting shell. As the moving plate moves, the gear is forced to rotate under the action of the tooth pattern. Due to the rigid connection between the rotating roller and the gear, the rotating roller also rotates during the rotation of the gear. Multiple brushes installed on the rotating roller rotate under the drive of the rotating roller. The rotating brush can clean the inside of the molding groove of the lower molding mold, clean out plastic debris, dust and other impurities remaining in the molding groove, and The dust pipe is connected to an external independently installed vacuum cleaner. The suction generated by the vacuum cleaner acts on the cleaning area through the rotating dust pipe, and the cleaned impurities are sucked into the storage container inside the vacuum cleaner, thereby effectively ensuring the cleanliness of the inside of the molding tank and preparing for the next injection molding operation. The bumper is separated from the molding tank and falls on the top of the movable plate by vibration, and then the bumper is taken out from the mold area with the help of the power of the screw motor. Compared with the traditional method of manually taking out the bumper from the inside of the molding tank, the cumbersome steps and labor intensity of manual operation are reduced, and the operation efficiency and convenience are improved. At the same time, the molding mold can be cleaned during the material removal process, which can also greatly reduce the time spent on cleaning operations due to shutdown, thereby improving the continuity and efficiency of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall position structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall disassembled structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the lower molding die structure of the present invention;

[0024] Figure 5 It is a structural schematic diagram of a connection shell of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the second connection shell of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the movable plate of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the cooling treatment component of the present invention;

[0028] Fig. 9It is a schematic diagram of the internal structure of the hardener placement box of the present invention;

[0029] Explanation of reference numerals in the figure: 100, mold placement seat; 110, ultrasonic generator; 120, support column; 130, through-hole; 140, support frame; 150, hydraulic lift; 160, upper injection mold; 170, rotating motor; 200, support platform; 201, exhaust port; 202, connecting shell 1; 203, filter plate; 204, air inlet valve; 205, connecting shell 2; 206, tooth pattern; 210, screw motor; 211, moving plate; 212, through-hole; 213, rubber pad; 214, air outlet; 215, support plate; 216, connecting plate; 217, rotating roller; 21 8. Dust suction port; 219. Gear; 220. Brush; 221. Guide block; 222. Rotating dust suction pipe; 223. Partition; 230. Lower molding mold; 231. Vibration motor; 300. Fixed shell; 310. Hardener placement box; 311. Return pipe; 312. Connecting air outlet; 313. Through groove 1; 314. Liquid level sensor; 315. Delivery pump; 320. Through groove 2; 330. Through circular groove; 340. Connecting seat; 341. Ultrasonic atomizer; 342. Mounting shell; 343. Cooling vortex tube; 344. Connecting pipe; 350. Fan; 351. Air pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-9 , the present invention provides a technical solution:

[0032] A mold for injection molding of automobile bumpers, comprising a mold placement seat 100, a lower mold assembly is arranged on the top of the mold placement seat 100, an upper mold assembly is also arranged on the outer wall of the mold placement seat 100, an ultrasonic generator 110 is arranged on the front outer wall of the mold placement seat 100, a through hole 130 is opened on the outer wall of the mold placement seat 100, a support column 120 is arranged at the bottom of the mold placement seat 100, and a lower mold assembly comprises a support table 200, the inner wall of the support table 200 is rotatably connected with a molding lower mold 230, and a vibration motor 231 is arranged at the bottom of the molding lower mold 230, so as to facilitate the use of the vibration motor 231 to cause the injection molded bumper to be separated from the molding groove of the molding lower mold 230;

[0033] The inner wall of the support platform 200 is provided with an exhaust port 201, which is convenient for using the exhaust port to exhaust the cold source airflow and re-enter the hardener placement box 310 after filtering through the filter plate 203. The outer wall of one side of the support platform 200 is provided with a connecting shell 1 202, and the connecting shell 1 202 corresponds to the exhaust port 201. The outer wall of the other side of the support platform 200 is provided with a connecting shell 205 and an air inlet valve 204. The outer wall in front of the support platform 200 is provided with a screw motor 210, and the output end of the screw motor 210 is connected to a screw. A material picking assembly is sleeved on the circumferential outer wall, and the material picking assembly includes a movable plate 211. A cleaning assembly is arranged on the outer wall behind the movable plate 211, and the cleaning assembly includes a connecting plate 216. A cooling treatment assembly is arranged at the bottom of the support platform 200, and the cooling treatment assembly includes a fixed shell 300. A hardener placement box 310 is arranged inside the fixed shell 300, and a connecting seat 340 is arranged at the bottom of the inner cavity of the fixed shell 300. An ultrasonic atomizer 341 electrically connected to the ultrasonic generator 110 is arranged on the top of the connecting seat 340.

[0034] Specifically, the upper mold assembly includes a support frame 140, a hydraulic lift 150 is arranged on the top of the support frame 140, the output end of the hydraulic lift 150 is connected to the upper injection mold 160, a rotating motor 170 is arranged on the outer wall of one side of the support frame 140, and the output end of the rotating motor 170 is connected to the outer wall of one side of the molding lower mold 230, so as to facilitate the use of the rotating motor 170 to drive the molding lower mold 230 to flip.

[0035] Furthermore, a filter plate 203 is fixedly connected to the inner wall of the connecting shell 202, and a return pipe 311 is also provided on the outer wall of the connecting shell 202. The return pipe 311 extends to the inside of the hardener placement box 310 and is connected to an air outlet tube 312 to facilitate the injection of the discharged cold source airflow into the inside of the hardener placement box 310 to form a bubble effect.

[0036] Furthermore, a through circular opening 212 is provided on the outer wall of the movable plate 211, and the through circular opening 212 matches the air inlet valve 204. An air outlet 214 is provided on the top of the movable plate 211. A rubber pad 213 is also provided on the top of the movable plate 211 to facilitate the use of multiple air outlets 214 to discharge the atomized hardener so that it can adhere to the surface of the bumper.

[0037] Furthermore, a rotating roller 217 is rotatably connected between the multiple connecting plates 216, a dust suction port 218 is opened on the circumferential outer wall of the rotating roller 217, a brush 220 is also provided on the circumferential outer wall of the rotating roller 217, a gear 219 is provided on the outer wall of one side of the rotating roller 217, a guide block 221 is provided on the outer wall of one side of the connecting plate 216, and a rotating dust suction pipe 222 is rotatably connected to the outer wall of the other side of the connecting plate 216, and the rotating dust suction pipe 222 extends to the inside of the rotating roller 217.

[0038] In some embodiments, the rotating dust suction tube 222 is connected to an external dust collector, which belongs to the prior art.

[0039] It is worth noting that a support plate 215 is provided on the front outer wall of the movable plate 211, and a partition plate 223 is also provided on the top of the plurality of connecting plates 216, so as to isolate the atomized hardener in a specific area and reduce its dispersion.

[0040] It is worth noting that a tooth pattern 206 matching the gear 219 is provided at the bottom of the inner cavity of the second connecting shell 205 , and a guide block 221 matching the guide block 221 is provided at the top of the inner cavity of the second connecting shell 205 , so as to facilitate driving the rotating roller 217 .

[0041] In addition, a second through groove 320 and a through circular groove 330 are provided on the outer walls on both sides of the fixed shell 300, a first through groove 313 corresponding to the second through groove 320 is provided on the outer walls on both sides of the hardener placement box 310, a liquid level sensor 314 is provided on the inner wall of the hardener placement box 310, and a delivery pump 315 is also provided on the side wall of the hardener placement box 310, and the output end of the delivery pump 315 is connected to a plurality of infusion tubes, and the ends of the plurality of infusion tubes are respectively connected to the water inlet ends of a plurality of ultrasonic atomizers 341.

[0042] In some embodiments: the ultrasonic generator 110 is mainly composed of an oscillation circuit, a power amplifier circuit and other parts, which converts electrical energy such as AC power into a high-frequency electrical energy signal. The ultrasonic atomizer 341 includes components such as a piezoelectric ceramic transducer. The high-frequency electrical energy generated by the ultrasonic generator 110 is applied to the piezoelectric ceramic transducer, causing the transducer to generate high-frequency mechanical vibrations. This vibration is transmitted to the liquid, causing violent fluctuations and cavitation on the surface of the liquid. The liquid is torn into tiny droplets under the impact force generated by the rupture of the cavitation bubble and the action of the fluctuation, thereby realizing the atomization process of the liquid. The two work together to efficiently convert electrical energy into ultrasonic vibration energy to achieve the purpose of atomizing the liquid, which belongs to the prior art.

[0043] In some embodiments: the hardener is a polyurethane liquid hardener, which is generated by the reaction of polyisocyanates and polyols. The polyisocyanate molecular structure contains -NCO (isocyanate group), which is a highly reactive group that can react with the hydroxyl group in the polyol. The structure of the polyol is diverse, such as polyether polyols and polyester polyols. The main chain of the polyether polyol molecule is connected by ether bonds, and has good flexibility and hydrolysis resistance; the main chain of the polyester polyol molecule contains ester bonds, which can provide good hardness and wear resistance. When the polyurethane liquid hardener forms a hardened layer, the carbamate bonds (-NH-CO-O-) in its molecular chain make the hardened layer have good elasticity and toughness, and can form an elastic protective layer on the surface of the car bumper to resist external impact and friction. The polyurethane liquid hardener can be turned into mist, which is mainly based on the principle of ultrasonic atomization. When the high-frequency electrical signal generated by the ultrasonic generator 110 acts on the piezoelectric ceramic transducer in the ultrasonic atomizer 341, the transducer converts electrical energy into high-frequency mechanical vibration energy and transmits it to the polyurethane liquid hardener. Due to the surface tension of the liquid, the liquid tends to remain in an aggregated state, but under the action of the high-frequency vibration, its surface tension is destroyed, and the molecules on the surface of the liquid are subjected to periodic pulling. The extrusion produces violent fluctuations. As the high-frequency vibration continues, numerous tiny cavitation bubbles are formed on the surface of the polyurethane liquid hardener. These cavitation bubbles generate huge impact force during expansion and collapse, thereby tearing the polyurethane liquid hardener into tiny droplets for atomization. At the same time, the airflow generated by the fan 350 and the cold wind generated by the cooling vortex tube 343 can draw the droplets into the interior of the movable plate 211, and then discharge them through the circular opening 212 at the top of the movable plate 211, so that they are evenly attached to the surface of the car bumper to form a certain protective layer, so that it can achieve additional performance while cooling. Secondly, appropriate solvents can be added to the polyurethane liquid hardener, such as ketones (acetone, butanone) or esters (ethyl acetate, butyl acetate) solvents, which can reduce its viscosity and make the hardener have better fluidity, which is convenient for subsequent atomization and adhesion operations and avoids the influence of excessive viscosity on the atomization effect.

[0044] In addition, multiple cooling vortex tubes 343 are fixedly sleeved on the inner wall of the circular groove 330, and a mounting shell 342 is connected between the cold air ends of the multiple cooling vortex tubes 343. The output ends of multiple ultrasonic atomizers 341 are arranged inside the mounting shell 342, and a connecting pipe 344 is arranged on the outer wall of the mounting shell 342. The ends of the multiple connecting pipes 344 are connected to the air inlet end of the fan 350, and the output end of the fan 350 is connected to the air supply pipe 351. The ends of the multiple air supply pipes 351 are respectively connected to the inside of the air inlet valve 204, so as to facilitate the transportation of the atomized liquid hardener.

[0045] In some embodiments, a drain port is disposed on the rear outer wall of the movable plate 211 to facilitate the discharge of excess liquid hardener.

[0046] In some embodiments: the device can be powered by an external conventional power supply, and the device can be controlled by an external PLC control box, all of which belong to the prior art.

[0047] Working principle of the present invention: After the injection molding of the automobile bumper is completed, the rotating motor is first turned on. When the rotating motor is running, it can drive the lower molding mold to flip along a specific axis until one side of the automobile bumper is in a downward position. Then the delivery pump 315 is started. The delivery pump 315 extracts the liquid hardener stored in the hardener placement box 310 and delivers it to the ultrasonic atomizer 341. The multiple ultrasonic atomizers 341 use the principle of high-frequency vibration to decompose the liquid hardener into tiny mist particles. At the same time, compressed gas is injected into the multiple cooling units. In the vortex tube 343, the cooling vortex tube 343 generates cold air with low temperature characteristics according to the special internal structure and gas flow principle. Under the combined action of the airflow generated by the fan 350 and the cold wind generated by the cooling vortex tube 343, the liquid hardener that has been converted into mist is pulled into the internal space of the moving plate 211. The mist hardener moves inside the moving plate 211 and is finally discharged outward through a plurality of through circular openings 212 evenly distributed on the top of the moving plate 211. Under the continuous blowing of the cold wind, the mist hardener is evenly attached to the surface of the car bumper. When the blowing process of the hardener is finished, the operation of the multiple ultrasonic atomizers 341 is stopped, but the working state of the cold air supply is maintained. During this period, the vibration motor 231 starts to work, and the vibration wave generated by it is transmitted to the lower molding mold 230, so that the bumper is separated from the molding groove under the action of vibration and falls on the moving plate 211 under the action of gravity. At this time, the other side of the bumper can be brought into contact with the cold source, thereby achieving a more comprehensive cooling treatment of the bumper. The excess discharged cooling gas is filtered through the filter plate, and the filtered cooling gas is reintroduced into the hardener placement box 310 through the reflux pipe 311. Inside the hardener placement box 310, the cooling gas forms bubbles and rises. On the one hand, the liquid hardener is evenly mixed under the disturbance of the bubbles, and on the other hand, the remaining cold in the cooling gas is transferred to the liquid hardener to further reduce its temperature. In this way, when the liquid hardener is atomized again, its own low temperature state can further cool the bumper, effectively improving the overall cooling effect of the automobile bumper and achieving full utilization of the cooling gas.

[0048] In addition, the liquid hardener mist technology is used in the treatment of automobile bumpers. The liquid hardener can be more densely and evenly attached to the outer wall of the automobile bumper in the form of mist, and is dried under the action of continuous air cooling, thereby forming a protective layer with certain protective performance, effectively improving the product quality of automobile bumpers. Performance indicators such as surface hardness, wear resistance, and corrosion resistance are all improved. This method of combining bumper surface treatment with cooling process expands the function of molds in the product processing process. It is no longer limited to simple molding functions, but also has the function of assisting product surface treatment and cooling optimization.

[0049] When the bumper needs to be taken out after cooling, multiple screw motors 210 are started synchronously, and the screws of the screw motors 210 are connected to the moving plate 211 carrying the bumper. The operation of multiple screw motors 210 drives the screws to rotate, thereby pushing the moving plate 211 to move outward. During the outward movement of the moving plate 211, the gear 219 fixedly arranged on the outer wall of one side of the rotating roller 217 cooperates with the tooth pattern 206 at the bottom of the inner cavity of the connecting shell 205. As the moving plate 211 moves, the gear 219 is forced to produce a rotational motion under the action of the tooth pattern 206. Due to the rigid connection between the rotating roller 217 and the gear 219, during the rotation of the gear 129, the rotating roller 217 also rotates accordingly. The multiple brushes 220 installed on the rotating roller 217 rotate under the drive of the rotating roller 217. The rotating brushes 220 can clean the inside of the molding groove of the lower molding mold 230, and remove the residual The plastic debris, dust and other impurities in the molding groove are cleaned out, and the rotating dust suction pipe 222 is connected to an independently arranged external vacuum cleaner. The suction generated by the vacuum cleaner acts on the cleaning area through the rotating dust suction pipe 222, and the cleaned impurities are sucked into the internal storage container of the vacuum cleaner, thereby effectively ensuring the cleanliness of the inside of the molding groove and preparing for the next injection molding operation. In addition, the bumper is separated from the molding groove and falls on the top of the movable plate 211 by vibration, and then the bumper is taken out from the mold area with the help of the power of the screw motor 210. Compared with the traditional method of manually taking out the bumper from the inside of the molding groove, the cumbersome steps and labor intensity of manual operation are reduced, and the operation efficiency and convenience are improved. At the same time, the lower molding mold 230 can be cleaned during the material taking process, and the time spent on cleaning operations due to shutdown can be greatly reduced, thereby improving the continuity and efficiency of the entire production process.

[0050] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. An injection mold for automobile bumper production, comprising a mold placement seat (100), a lower mold assembly being arranged on the top of the mold placement seat (100), and an upper mold assembly being arranged on the outer wall of the mold placement seat (100), characterized in that: The front outer wall of the mold placement seat (100) is provided with an ultrasonic generator (110), the outer wall of the mold placement seat (100) is provided with a through hole (130), the bottom of the mold placement seat (100) is provided with a support column (120), the lower mold assembly comprises a support platform (200), the inner wall of the support platform (200) is rotatably connected with a molding lower mold (230), the bottom of the molding lower mold (230) is provided with a vibration motor (231), the inner wall of the support platform (200) is provided with an exhaust port (201), the outer wall of one side of the support platform (200) is provided with a connecting shell 1 (202), the connecting shell 1 (202) corresponds to the exhaust port (201), and the outer wall of the other side of the support platform (200) is provided with a connecting shell 2 (205) and an air inlet A valve (204) is provided on the front outer wall of the support platform (200), the output end of the screw motor (210) is connected to a screw, the circumferential outer wall of the screw is sleeved with a material taking component, the material taking component includes a moving plate (211), the rear outer wall of the moving plate (211) is provided with a cleaning component, the cleaning component includes a connecting plate (216), a cooling treatment component is provided at the bottom of the support platform (200), the cooling treatment component includes a fixed shell (300), a hardener placement box (310) is provided inside the fixed shell (300), a connecting seat (340) is provided at the bottom of the inner cavity of the fixed shell (300), and an ultrasonic atomizer (341) electrically connected to the ultrasonic generator (110) is provided at the top of the connecting seat (340).

2. The injection mold for automobile bumper production according to claim 1, characterized in that: The upper mold assembly comprises a support frame (140), a hydraulic lift (150) is arranged on the top of the support frame (140), the output end of the hydraulic lift (150) is connected to the upper injection mold (160), and a rotating motor (170) is arranged on the outer wall of one side of the support frame (140), and the output end of the rotating motor (170) is connected to the outer wall of one side of the lower molding mold (230).

3. The injection mold for automobile bumper production according to claim 1, characterized in that: The inner wall of the connecting shell (202) is fixedly connected with a filter plate (203), and the outer wall of the connecting shell (202) is also provided with a return pipe (311). The return pipe (311) extends to the inside of the hardener placement box (310) and is connected to a gas outlet tube (312).

4. The injection mold for automobile bumper production according to claim 1, characterized in that: The outer wall of the movable plate (211) is provided with a through circular opening (212), the through circular opening (212) matches the air inlet valve (204), the top of the movable plate (211) is provided with an air outlet (214), and the top of the movable plate (211) is also provided with a rubber pad (213).

5. The injection mold for automobile bumper production according to claim 1, characterized in that: A rotating roller (217) is rotatably connected between the plurality of connecting plates (216); a dust suction port (218) is provided on the circumferential outer wall of the rotating roller (217); a brush (220) is also provided on the circumferential outer wall of the rotating roller (217); a gear (219) is provided on the outer wall of one side of the rotating roller (217); a guide block (221) is provided on the outer wall of the connecting plate (216) on one side; and a rotating dust suction pipe (222) is rotatably connected to the outer wall of the connecting plate (216) on the other side; the rotating dust suction pipe (222) extends into the interior of the rotating roller (217).

6. The injection mold for automobile bumper production according to claim 1, characterized in that: A support plate (215) is provided on the front outer wall of the movable plate (211), and a partition plate (223) is also provided on the top of the plurality of connecting plates (216).

7. The injection mold for automobile bumper production according to claim 1, characterized in that: The bottom of the inner cavity of the second connecting shell (205) is provided with a tooth pattern (206) matching the gear (219), and the top of the inner cavity of the second connecting shell (205) is provided with a guide block (221) matching the guide block (221).

8. The injection mold for automobile bumper production according to claim 1, characterized in that: The outer walls on both sides of the fixed shell (300) are also provided with a second through groove (320) and a through circular groove (330), the outer walls on both sides of the hardener placement box (310) are provided with a first through groove (313) corresponding to the second through groove (320), the inner wall of the hardener placement box (310) is provided with a liquid level sensor (314), and the side wall of the hardener placement box (310) is also provided with a delivery pump (315), the output end of the delivery pump (315) is connected to a plurality of infusion tubes, and the ends of the plurality of infusion tubes are respectively connected to the water inlet ends of the plurality of ultrasonic atomizers (341).

9. The injection mold for automobile bumper production according to claim 8, characterized in that: A plurality of cooling vortex tubes (343) are fixedly sleeved on the inner walls of the through circular grooves (330); a mounting shell (342) is connected between the cold air ends of the plurality of cooling vortex tubes (343); output ends of the plurality of ultrasonic atomizers (341) are arranged inside the mounting shell (342); a connecting tube (344) is arranged on the outer wall of the mounting shell (342); the ends of the plurality of connecting tubes (344) are connected to the air inlet end of the fan (350); the output end of the fan (350) is connected to an air supply pipe (351); the ends of the plurality of air supply pipes (351) are respectively connected to the inside of the air inlet valve (204).

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